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Common Radiator Power Outputs

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Related Information

 

• Single panel
• Single panel with fins
• Double panel
• Double panel with fins
• Double panel with double fins
• Comments on this article

Useful External Links

• Boiler Size Calculator (est.org.uk)

• Introduction to radiators
• Radiator thermostats & valves
• Hot water systems
• Choosing a new boiler

• Find a Radiator Supplier near you

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Measure the width and height of your radiator, then use the appropriate table below to determine it's power output in Watts.

• 1 Kilo Watt (kW) = 1000 Watts.
• 1 Watt is approx. 3.4 BTU/hour, or
• 1000 BTU/hour = 293 Watts.

Single panel

Single Panel

Length mm 600 900 1200 1500 1800 feet 2 3 4 5 6

                   

Height

300mm (12ins) 450mm (18ins) 600mm (24ins) 750mm (30ins)

260 390 520 650 780 380 570 760 950 1140 490 735 980 1125 1470 580 870 1160 1450 1740

Single panel with fins

Single Panel with fins

Length mm 600 900 1200 1500 1800 feet 2 3 4 5 6

                   

Height

300mm (12ins) 450mm (18ins) 600mm (24ins) 750mm (30ins)

370 555 740 925 1110 560 840 1120 1400 1680 720 1080 1440 1800 2160 860 1290 1720 2150 2580

Double panel

Double Panel

Length mm 600 900 1200 1500 1800 feet 2 3 4 5 6

                         

Height

300mm (12ins) 450mm (18ins) 600mm (24ins) 750mm (30ins)

400 600 800 1000 1200 560 840 1120 1400 1680 700 1050 1400 1750 2100 860 1290 1720 2150 2580

Double panel with fins

Double Panel with fins

Length mm 600 900 1200 1500 1800 feet 2 3 4 5 6

                   

Height

300mm (12ins) 450mm (18ins) 600mm (24ins) 750mm (30ins)

580 870 1160 1450 1740 860 1290 1720 2150 2580 1100 1650 2200 2750 3300 1280 1920 2560 3200 3840

Double panel with double fins

Double Panel with double fins

Length mm 600 900 1200 1500 1800 feet 2 3 4 5 6

                   

Height

300mm (12ins) 450mm (18ins) 600mm (24ins) 750mm (30ins)

760 1140 1520 1900 2280 1040 1560 2080 2600 3120 1340 2010 2680 3350 4020 1600 2400 3200 4000 4800

Further information and useful links

• Introduction to radiators
• Radiator thermostats & valves
• Hot water systems
• Choosing a new boiler

• Find a Radiator Supplier near you

• Find a CORGI Registered Installer
• Gas Regulations

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